I was trying to do something that should be really simple ;) but it
wasn't cooperating, and I have yet to find any resources that explain how
to do what I wanted. I was finally able to get it to work. I thought you
might want to put it in the library.

Basically, I wanted to determine what kind of browser is being used so I
can decide whether to serve up stylesheets or not. Should be simple, right?

The trick is figuring out what browser supports what features, of
course. This could be adapted for any feature you wanted to check. Of
course, there's also the BrowserMatch directive, but I don't seem to
have access to that on my server.